Electromagnet for surgical purposes.



G. T. FETTB.

ELEGTROMAGNET FOR SURGICAL PURPOSES. A APPLICATION FILED 00T. 7, 1909. v Patented July 30, 1912. 2 SHEETS-SHEET 1.

G. T. FETTE. ELECTROMAGNBT FOR SURGICAL PURPOSES.

APPLICATION FILED 00T. 7,1909. l.

Patnted July 30, 1912.

2 SHEETS-SHEET 2.

FT E.

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GEORGE T. FETIE, OF CINCINNATI, OHIO.

ELECTROMAGNET FOR SURGICAL PURPOSES.

Specicaton of Letters Patent.

Patented July so, 1912.

Application filed October 7, 1909. vSerial No. 521,608.

To all ru/wm t may concern:

Be it known that I, GEORGE T. FETTE, a citizen of the United States, residing at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Electromagnets for Surgical Purposes, of which the following is a specification.

My invention relates to electro-magnets forsurgical purposes and is-especially applicable for detecting and extracting or aiding in extracting foreign bodies from the eye, although the same is also applicable for acting on foreign bodies in other relations. My invention is best explained in comicotion with its application for detecting or eX- tracting or aidingin extracting foreign substances from the eye, and is shown in such relat-ionjin the drawings, and the invention will befreadily understood from the following description and claims, and from the drawings, in which latter Figure 1 is a side elevation of my improved device, shown in connection with its application to an eye. ."g. 2 is a rear per- I spective view o f my improved device. Fig. 3 is a top plan view of the same, with the hand-piece removed. Fig. 4 is a front elevat-ion of-my improved device looking ina direction'at right anglestothe axes of the cores and shown partly broken away for better illustration' of the parts. Fig. 5 is a plan view of the upper end of one of the cores-and showing the adjustment for the pole-piece thereon; and, Fig. 6 is a diagrammatic representation of the electric circuit.

The electro-magnet comprises a base 1 which forms a yoke between the cores 2 2 about which the windings 3 3 are received.

The cores are shown attached to the base by screws 4. A bar 5 of non-magnetic material, as brass, having rings 6 received about the upper ends of the wound cores, preferably connects the outer ends of the wound cores and braces the same from each other.

7 7 represent the pole-pieces for the magv net, t-hese pole-pieces being of bent form and gradually reducing in cross-section for forming tips 8 8 which are arranged to be placed in positions extending toward each other, the magnet, when the tips are so placed, forming a horse-shoe electro-magnet.

The pole-pieces are arranged for permitting adjustment for distance and also preferably elevation with relation to each other.

For accomplishing this the4 pole-pieces are' shown constructed separate from the cores of the magnet and preferably have swiveling and slidable connection therewith. Thus the upper end of each of the cores is shown provided with an undercut slot 9 for K receiving the head of a bolt 10.

11 is a nut having a long threaded hub 12 arranged to be received over the bolt, the bolt and hub being received in aperture 13 in the pole-piece. If desired, but one of the pole-pieces may be made adjustable. Preferably one of the pole-pieces is provided with an adjusting screw 15 having a threaded bearing 16 in the upper end of the core and journaled but held against endwise movementin an aperture 17 in the bolt- 10, the turning of the adjusting-screw shifting the bolt and pole-piece.

2l is a spacing-disk arranged to' be placed between the core and the pole-piece for adjusting the tips of the pole-pieces to relative elevation, the bolt 10 being received through an aperture 22 in said spacing-disk. `One or more of the spacing-disks may be employed for one or both of `the poles of the magnet for elevating either tip above the other. By means of my improved device any desirable relative position of tle tips may be obtained for producing the best 'results in the opera- `tion being performed. The electric energy may be supplied from any suitable source of electric energy, indicated at 23. The -elec- .tro-magnetmay be electrically connected with an ordinary incandescent lamp socket. 24 25 represent the` magnet-terminals.

Electric conductors 26 27 may connect these terminals with a reversing switch 29, electric conductors 26 27 connecting the reversing switch wit-h the magnet-windings. A rheostat28 is preferably interposed in one of the electric conductors for the magnet for I regulating the strength of current supplied thereto and for reversing the polarity of the tips, if this is ldesired in the course of the 100 operation. `The rheostat and switch are mounted on a bracket 30.

31 is an indicator for indicating the presi ence of electric current in the magnet and may be a ball 32 of magnetic material for 105 instance offiron loosely slidable on `a rod 33 of non-magnetic material, kfor instance brass, U

and adjustable to distance from the polepiece by a nut 34 also of non-magnetic material. The han may be adjusted with ren- 110.?v

tion to the markings of a gage 35 of nonmagnetic material for regulating the gap between the ball and pole-piece for indicating the presence of the desired strengt-h of current. If-the desired strength of current is not present, the ball will not be attracted to the pole-piece. Immediately upon absence of current the ball drops from the pole-piece.

36 is a hand-piece connected by a chain 37 with a bolt 3S releasably received in one of the pole-pieces 7, and 39 is a releasable instrument, such as a magnetic hand-bar, arranged to be magnetized by the magnetic flux passing through thecore. Various instruments may he placed in the hand-piece.

The base, cores, pole-pieces, bolt 38, chain 37, hand-piece 36, and linstrument 39 are made of metal which is readily magnetized by an electric current for forming a temporary magnet. Thus the b ase may be of castiron, the cores of soft wrought iron, the pole.- pieces of cast steel, and the chain. hand-piece and releasable instrument of 'similar materials effecting a similar urpose.

On the contrary, the nuts 11, a justing screws 15, rod 33, nut 34 and gage 35 are preferably made of non-magnetic material, for instance brass. The electro-magnet is preferably of large size for eifectually performing the functions for which it is intended and is arranged to exert a powerful magnetic force. l

If it is desired to perform the operation of making a test for the presence of a foreign substance lin the eye which is amenable to magnetic attraction, or to dislodge or to aid in dislodging such foreign substance from the eye, the patient is placed in easy position, for instance in sitting posture in front of the magnet, with the tips located approximate to the eye. The cores 2 2 are arranged inclined upon the base for enabling the tips.

8 8 to be placed in forward position with relation to the body of the instrument for close approximation thereof to the eye of the pa? tient. The outer ends of the pole tips and the upper forward ends of the wound cores when in normal positions are preferably located in substantially coincident vertical" planes. The tips S S are adjusted to position either close together or at desirable distance from each other and-at desirable elevation with relation to e'aeh other for causing the magnetic flux to pass in such course with relation to the eye as to be most likely to have effect upon the foreign substance, which may be instanced as an/iron splinter in the interior of the eye-ball. The strength of current maybe regulated by the rheostat and if it desired to change the course of th'e current this may be accomplished by the reversing switch.

With my improved device the splinter may be giien a course of movement which will prevent injury to those parts of the eyeball which would result in permanent harm or difficult healing, and the splinter may be attracted from. the remotest parts of the eyeball, and dislodged if firmly embedded therein. `When the splinter has assumed a position near the periphery of the eye-ball, the hand-instrument may be employed either for finally directing the course of the splinter or attracting the same in its removal, and

are preferably separated for increasing the flux received by the hand-instrument.

My improved device is extremely serviceable and provides means whereby an extremely great range of power may' be ob- -tained for performing the operation and supplying just the power necessary Afor p erforming the same. A low or a very high voltage may be supplied to the pole-tips or the magnetic force may be regulated and directed by separatingor causing approach between the tips, or adjusting the same to elevation.

Having thus fully describedmy invention, what I .claim as new and desire to secure by Letters Patent is: 1. In an electro-magnet for surglical purposes of the character described, t e combination of a U-shaped magnet comprising inclined wound cores and pole-pieces for .said cores having tips thereon, and means for permitting adjustment of the distance between said tips, the inclination of said, 4wound cores being such as to cause the outer ends of said tips and the forward upper ends of said wound cores to be normally located in coincident vertical planes, and a magnetic indicator on lone of said pole-pieces, substantially as described. 2. In an electro-magnet for surgical purposes of the character described, the combination of a U-shaped magnet comprising inclined wound cores and pole-pieces for said cores having tips thereon, a hand-magnetpiece releasably secured to one of said pole- `pieces, and means for permitting adjustment nation of said wound cores being such as to cause the outer ends of said tips and the forward upper ends of said wound cores to be normally located in coincident vertical planes, substantially as described.

3. In combination, an electro-magnet for surgical purposes of the character described, comprising connected cores. electric windings for said cores,polepieces, a spacing disk releasably received between one of said pole-4 pieces and cores, and means for permitting relative adjustment between said pole-pieces,

when the hand-piece is employed the tips 8 8 p aud constructed and arranged for adjusting the distance and height between said polepieces. substantially .\s.,de.-;cribed.

4. In combination, an electro-magnet for su'rgical purposes of the character described, comprisingv a pair of connected cores and electric windings therefor, of pole-pieces for vsaid cores, means for permitting side-wise and swiveling adjustment of said pole-pieces on said cores, said pole-pieces being provided with ole-tips and means for relatively adjusting said pole-tips with relation to height, andv constructed and arranged for permitting adjustment of lateral distance and elevation between said pole-tips,`sub

-stantially as described.

6.In combination, an electro-magnet for suigi'caI purposes of the character described comprising a pair of connected cores and windings therefor, a pole-piece for each of said cores provided with a pole-tip, a magnetic hand-piece having flexible magnetic connection with one of said pole-pieces, one

-of said pole-pieces having slidable connection with said core,said core having an undercut slot at its upper end, and a headed bolt received in' saidI slot-'foitclampng said pole-piece to said core, Land-.constructed for adjusting the distance between said .poletips, substantially as described.

7. In combination, an electro-magnet for surgicalpurposes of the character described,

comprising a pair of connected cores and' electric windings therefor, 'a ole-piece for each of said cores having swive ing and sliding connection therewith, a magnetic indi. cator on one of said polepieces, a magnetica'. hand-piece, and a flexible magnetic connec-Y tion between said hand-piece and one of said. pole-pieces, substantially as described.`

8. In an elettro-magnet for surgical pui'- poses of the character described, the combination of a pair of cores magnetically connected at one end thereof, electric windings for said cores, pole-pieces at the other end of said cores having tips thereon, and means for permitting adjustmentof distance between, said tips laterally to said cores, substantialigea's described.

I with relation to' each other and longitudiinally witlirelationv In testimony whereof, I have signed my' name hereto in the presence of two subscribing witnesses.

Witnesses: l

LILLIAN BURNn'i'r, JOHN R. SGHINDEL.'

Copies o! this patent4 may be obtained for five cents each. by addressing the Commissioner of Intentar Washington, D. C.

GEORGE? rr. rifi'r'rE.l u 

